I get the summertime blues with my Yamaha ProMix1. In the hot months, it makes bad noises, but is fine the rest of the time. I want to rectify (no pun intended) this problem. Do I want a line conditioner, a voltage regulator, or both? The mixer itself is in a cool room in the summer. What do big studios use to ensure clean power to their expensive equipment? Any info would be gretyly appreciated.